Hello everybody!
I am searching for a relay button to deactivate the whole Arduino Telemetry System for my project. The Arduino is powered by a DCDC converter that has ouput 13.8 Volt. Any thoughts?
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Much more information is needed.
I was indeed quite generic.
I have the below schematic
I need to have a switch so that i can turn the telemetry system on/off. Also, I forgot to mention that if possible, i need to be able to cutoff the whole system except the telemetry
Thanks for the schematic. I do not see what you mean by telemetry. There is NO output. What you are writing about is all based on your software. If you want a switch to do something, you need to incorporate the function into your program.
The telemetry system is powered by the Arduino. For simplicity I don't show it in this schematic as it is not needed. I don't want to import it in the program. I want a physical switch so that i can have the arduino operating on it's own by this switch(button) and i was wandering what kind of switch should i use for that.
What kind do you have available?
I need to order
As long as the switch has two contacts that can be closed or opened, that is all you need. Your program can test for the position of the switch and then do whatever you desire.
in case of emergency cuttoff is there something you would suggest?
An emergency power cutoff switch.
I don't know this detail.
It’s kind of important as the Arduino output is only 0 to 5V.
With no disrespect intended, the way you have drawn your schematic is non-standard and makes it quite difficult to see what is being done.
No problem at all. But it is actually a team project and I don't have the total understanding of it. Can I ask for something specific so that you can understand it better?
The schematic is ass backwards in several areas.
The standard is to have positive voltages at the top of components, GND at the bottom; in this case Vin on the Arduino is on the bottom.
Looks like you have drawn a P MOSFET, if so the inter body diode, drain to source, will always be forward biased.
With MOSFET symbols, always use one showing the internal diode.
You need to be sure if you need a HIGH or LOW side switch for the relay coil.
You should use the proper symbol for the relay.
Suggest you add a supervision light.
A manual switch or switch with relay combination can be use to disable the circuit.
BTW,
- it is recommended Vin be 7 to 9V.
- The high amperage fuses suggest lots of current, you may expect huge switching spike interfering to the Arduino if things are not wired with noise in mind and if there isn’t proper supply conditioning.
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